摘要 通过苄基仲醇、脂肪族叔醇和烷基/芳基腈的反应,已经以良好的收率开发了一种经济有效且环境友好的化学选择性一锅法合成多种 N 取代酰胺的方案。市售的 Amberlyst®-15(H) 已在 80 °C 下用作空气稳定且可重复使用的非均相廉价固体酸催化剂,无需任何无水和惰性环境。本合成方案的吸引人的特点是反应条件温和、反应时间短、化学选择性好、原子经济性高和对各种敏感部分的耐受性。图形概要
Highly Selective Amidation of Benzylic Alcohols with Nitriles. A Modified Ritter Reaction
作者:H. Firouzabadi、A. R. Sardarian、H. Badparva
DOI:10.1080/00397919408012637
日期:1994.3
Abstract Benzyl alcohols react selectively with different nitriles in the presence of a catalytic amount of borontrifluoride and produce amides in high yields. Deactivated p-nitrobenzyl, allylic, primary, secondary, and tertiary saturated alcohols do not react.
作者:Yuehua Chen、Boxuan Yang、Qian-Yu Li、Yu-Mei Lin、Lei Gong
DOI:10.1039/d2cc05569d
日期:——
Transition metal- and photosensitizer-free C(sp3)–H (sulfonyl)amidationreactions have been realized by employing Selectfluor® as a versatile reagent, functioning as a photoactive component, a HAT precursor and an oxidant. Various toluene derivatives, cycloalkanes, natural products and bioactive molecules can be converted into N-containing products under mild conditions in good yield and with high
A General Photocatalytic Strategy for Nucleophilic Amination of Primary and Secondary Benzylic C–H Bonds
作者:Madeline E. Ruos、R. Garrison Kinney、Oliver T. Ring、Abigail G. Doyle
DOI:10.1021/jacs.3c04912
日期:2023.8.23
intercepted by a variety of N-centered nucleophiles, including nitriles (Ritter reaction), amides, carbamates, sulfonamides, and azoles, for the construction of pharmaceutically relevant C(sp3)–N bonds under unified reaction conditions. Mechanistic studies indicate that HAT is amidyl radical-mediated and that the photocatalyst operates via a reductive quenching pathway. These findings establish a mild, metal-free
[EN] CATALYTIC ASYMMETRIC HYDROGENATION, HYDROFORMYLATION, AND HYDROVINYLATION VIA TRANSITION METAL CATALYSTS WITH PHOSPHINES AND PHOSPHITES<br/>[FR] HYDROGENATION CATALYTIQUE ASYMETRIQUE, HYDROFORMULATION, ET HYDROVINYLATION VIA DES CATALYSEURS A METAUX DE TRANSITION AVEC PHOSPHINES ET PHOSPHITES
申请人:THE PENN STATE RESEARCH FOUNDATION
公开号:WO1999059721A1
公开(公告)日:1999-11-25
(EN) Novel transition metal catalysts with conformationally rigid chiral phosphines and phosphites are developed for asymmetric carbon-hydrogen and carbon-carbon bond formation. The invention emphasizes synthesis of chiral amines, $g(b)-amino acids and related compounds via catalytic asymmetric hydrogenation based on chiral monodentate and bidentate phosphines with cyclic ring structures. The ligands contain rigid ring structures.(FR) L'invention concerne l'élaboration de catalyseurs à métaux avec phosphines et phosphites de forme chirale à rigidité conformationnelle, pour la formation de liaisons asymétriques carbone-hydrogène et carbone-carbone. L'invention porte en particulier sur la synthèse d'amines chirales, de bêta-aminoacides et de composés connexes par hydrogénation catalytique asymétrique reposant sur des phosphines chirales monodentées et bidentées qui présentent des structures à noyau cyclique. Les ligands présentent des structures à noyau rigide.